The document summarizes the invention and history of various technologies from razors in 1931 to potential future technologies. Key inventions discussed include razors, microwave ovens, credit cards, color TV, long playing records, PCs, email, digital watches, cameras, phones, CDs, camcorders, the world wide web, GPS, USB sticks, online games like Runescape, iPods, Facebook, iPhone models, and predictions for the future including holographic/voice controlled computers, mind-controlled games and robots, transparent phones, larger USB storage, and advanced watch features.